Poulos C, Riewpaiboon A, Stewart JF, Clemens J, Guh S, Agtini M, Anh DD, Baiqing D, Bhutta Z, Sur D, Whittington D. Cost of illness due to typhoid fever in five Asian countries. Trop Med Int Health. 2011 Mar 1;16(3):314-23.
Parsley (Edwards) TL. Review of the phantom respondents: opinion surveys and political representation. J Off Stat. 1994;10(3):351-5.
Longfield JN, Townsend TR, Cruess DF, Stephens M, Bishop (Johannes) C, Bolyard C, Hutchinson E. Methicillin-resistant Staphylococcus aureus (MRSA): risk and outcome of colonized vs. infected patients. Infect Control. 1985 Nov;6(11):445-50. doi: 10.1017/S0195941700064791